Grinding roller of a roller mill

1. Grinding roller of a roller mill, having a roller shaft, a main roller body, and an outer wear ring having wear protection, the connection between the roller shaft and the main roller body being formed by a shrink fit,

characterised in that the main roller body is formed by at least 3 coaxially arranged intermediate rings.

2. Grinding roller according to claim 1 , characterised in that the connections between the intermediate rings and the wear ring are likewise formed by a shrink fit.

3. Grinding roller according to claim 2 , characterised in that the shrink fit is in conical or cylindrical form.

4. Grinding roller according to claim 1 , characterised in that the diameter of the grinding roller is at least 3.00 m.

5. Grinding roller according to claim 1 , characterised in that the diameter of the grinding roller is at least 4.50 m and the width is at least 2.00 m.

6. Grinding roller according to claim 1 , characterised in that the wear protection is formed by shaped bodies which protrude from the surface of the wear ring and/or by a hard build-up weld.

7. Roller mill for the comminution of brittle grinding stock, having two grinding rollers according to claim 1 , wherein the two grinding rollers are driven in opposite directions.

8. Roller mill according to claim 7 , characterised in that the roller mill is formed by a high-pressure roller mill which comprises a force application system that is in operative connection with at least one grinding roller for generating a grinding pressure of at least 50 MPa.

9. Roller mill according to claim 8 , characterised in that the roller shafts of the grinding rollers are mounted in slide bearings.